www.pudn.com > Step03_Solved.zip > utilities.cpp

#include "utilities.h" 
 
//  
// Create a new layer or return the ObjectId if it already exists  
//  
// In :  
//     const TCHAR* layerName     : layer name  
// Out :  
//     AcDbObjectId& layerId     : ObjectId of the created or existing layer  
//  
 
Acad::ErrorStatus createLayer (const TCHAR *layerName, AcDbObjectId &layerId) { 
	Acad::ErrorStatus es ; 
	AcDbLayerTable *pTable ; 
 
	layerId =AcDbObjectId::kNull ; 
	if ( (es =acdbHostApplicationServices ()->workingDatabase ()->getLayerTable (pTable, AcDb::kForRead)) == Acad::eOk ) { 
		// Use the overload of AcDbLayerTable::getAt() that returns the id 
		if ( (es =pTable->getAt (layerName, layerId, Adesk::kFalse)) != Acad::eOk ) { 
			// Create a new layer table record using the layer name passed in 
			AcDbLayerTableRecord *pLTRec =new AcDbLayerTableRecord ; 
			pLTRec->setName (layerName) ; 
			// Set other properties - color, linetype, state - if desired 
			// this will require more input than this simple example provides 
			if ( (es =pTable->upgradeOpen ()) == Acad::eOk ) { 
				es =pTable->add (layerId, pLTRec) ; 
				// Since the new layer was successfully added to the database, 
				// close it - DON'T delete it 
				pLTRec->close () ; 
			} else { 
				// The object is not part of the database, therefore we should 
				// delete it to avoid a memory leak 
				delete pLTRec ; 
			} 
		} 
		pTable->close () ; 
	} 
	return (es) ; 
} 
 
//  
// Create a new block table record and add the entities of the employee to it  
//  
// In :  
//     const TCHAR* name : Name of block table record  
//  
 
Acad::ErrorStatus createBlockRecord (const TCHAR *name) { 
	// First, check if a block of the same name already exists 
	// by verifying in the current database block table. 
	AcDbBlockTable *pBlockTable ; 
	// Open the block table for read 
	Acad::ErrorStatus es ; 
	if ( (es =acdbHostApplicationServices ()->workingDatabase ()->getBlockTable (pBlockTable, AcDb::kForRead)) != Acad::eOk ) 
		return (es) ; 
 
	if ( pBlockTable->has (name) == Adesk::kTrue ) { 
		pBlockTable->close () ; 
		return (Acad::eDuplicateKey) ; 
	} 
	// Now we know the block does not exist, so we create it 
	// using the name passed in. 
	AcDbBlockTableRecord *pBlockTableRecord =new AcDbBlockTableRecord ; 
	pBlockTableRecord->setName (name) ; 
	// To keep it simple, we use the origin for the insertion point 
	pBlockTableRecord->setOrigin (AcGePoint3d::kOrigin) ; 
	// Open the block table for write 
	// since we are adding a new block definition 
	if ( (es =pBlockTable->upgradeOpen ()) != Acad::eOk ) { 
		delete pBlockTableRecord ; 
		pBlockTable->close () ; 
		return (es) ; 
	} 
	// Add the new block table record to the block table. 
	// For now, the block table record is empty. 
	if ( (es =pBlockTable->add (pBlockTableRecord)) != Acad::eOk ) { 
		// The block table record has not been added 
		// to the block table, so we have to delete it. 
		pBlockTable->close(); 
		delete pBlockTableRecord; 
		return (es) ; 
	} 
	pBlockTable->close () ; 
	// Now the block table record is in the database, but is empty 
	// (has no sub-entity). 
	// Note that after having been added to the database, an object or an entity 
	// is implicitely opened for write. 
	// 
	// So we create the sub entities to append to the block 
	// which will represent a "happy face": 
	// the block should consist of a round yellow face (circle) 
	// two blue eyes (circles) and a red mouth (arc) 
	AcDbCircle *pFace =new AcDbCircle (AcGePoint3d::kOrigin, AcGeVector3d::kZAxis, 1.0) ; 
	AcDbCircle *pLeftEye =new AcDbCircle (AcGePoint3d (0.33, 0.25, 0.0), AcGeVector3d::kZAxis, 0.1) ; 
	AcDbCircle *pRightEye =new AcDbCircle (AcGePoint3d (-0.33, 0.25, 0.0), AcGeVector3d::kZAxis, 0.1) ; 
	AcDbArc *pMouth =new AcDbArc (AcGePoint3d (0, 0.5, 0), 1.0, 3.141592 + (3.141592 * 0.3), 3.141592 + (3.141592 * 0.7)) ; 
	// Set the color property. 
	pFace->setColorIndex (2) ; 
	pLeftEye->setColorIndex (5) ; 
	pRightEye->setColorIndex (5) ; 
	pMouth->setColorIndex (1) ; 
	// add the entities to the new block table record 
	if ( (es =pBlockTableRecord->appendAcDbEntity (pFace)) != Acad::eOk ) { 
		delete pFace ; 
		delete pLeftEye ; 
		delete pRightEye ; 
		delete pMouth ; 
		pBlockTableRecord->erase () ; 
		pBlockTableRecord->close () ; 
		return (es) ; 
	} 
	pFace->close () ; 
 
	if ( (es =pBlockTableRecord->appendAcDbEntity (pLeftEye)) != Acad::eOk ) { 
		delete pLeftEye ; 
		delete pRightEye ; 
		delete pMouth ; 
		pBlockTableRecord->erase () ; 
		pBlockTableRecord->close () ; 
		return (es) ; 
	} 
	pLeftEye->close () ; 
 
	if ( (es =pBlockTableRecord->appendAcDbEntity (pRightEye)) != Acad::eOk ) { 
		delete pRightEye ; 
		delete pMouth ; 
		pBlockTableRecord->erase () ; 
		pBlockTableRecord->close () ; 
		return (es) ; 
	} 
	pRightEye->close () ; 
 
	if ( (es =pBlockTableRecord->appendAcDbEntity (pMouth)) != Acad::eOk ) { 
		delete pMouth ; 
		pBlockTableRecord->erase () ; 
		pBlockTableRecord->close () ; 
		return (es) ; 
	} 
	pMouth->close () ; 
 
	pBlockTableRecord->close () ; 
 
	return (Acad::eOk) ; 
}